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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2007 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.collect;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import static com.google.common.base.Preconditions.checkArgument;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import com.google.common.annotations.GwtCompatible;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import com.google.common.annotations.GwtIncompatible;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.io.IOException;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.io.ObjectInputStream;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.io.ObjectOutputStream;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.EnumMap;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.Map;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>/**<a name="line.31"></a>
<span class="sourceLineNo">032</span> * A {@code BiMap} backed by two {@code EnumMap} instances. Null keys and values<a name="line.32"></a>
<span class="sourceLineNo">033</span> * are not permitted. An {@code EnumBiMap} and its inverse are both<a name="line.33"></a>
<span class="sourceLineNo">034</span> * serializable.<a name="line.34"></a>
<span class="sourceLineNo">035</span> * <a name="line.35"></a>
<span class="sourceLineNo">036</span> * &lt;p&gt;See the Guava User Guide article on &lt;a href=<a name="line.36"></a>
<span class="sourceLineNo">037</span> * "http://code.google.com/p/guava-libraries/wiki/NewCollectionTypesExplained#BiMap"&gt;<a name="line.37"></a>
<span class="sourceLineNo">038</span> * {@code BiMap}&lt;/a&gt;.<a name="line.38"></a>
<span class="sourceLineNo">039</span> *<a name="line.39"></a>
<span class="sourceLineNo">040</span> * @author Mike Bostock<a name="line.40"></a>
<span class="sourceLineNo">041</span> * @since 2.0 (imported from Google Collections Library)<a name="line.41"></a>
<span class="sourceLineNo">042</span> */<a name="line.42"></a>
<span class="sourceLineNo">043</span>@GwtCompatible(emulated = true)<a name="line.43"></a>
<span class="sourceLineNo">044</span>public final class EnumBiMap&lt;K extends Enum&lt;K&gt;, V extends Enum&lt;V&gt;&gt;<a name="line.44"></a>
<span class="sourceLineNo">045</span>    extends AbstractBiMap&lt;K, V&gt; {<a name="line.45"></a>
<span class="sourceLineNo">046</span>  private transient Class&lt;K&gt; keyType;<a name="line.46"></a>
<span class="sourceLineNo">047</span>  private transient Class&lt;V&gt; valueType;<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span>  /**<a name="line.49"></a>
<span class="sourceLineNo">050</span>   * Returns a new, empty {@code EnumBiMap} using the specified key and value<a name="line.50"></a>
<span class="sourceLineNo">051</span>   * types.<a name="line.51"></a>
<span class="sourceLineNo">052</span>   *<a name="line.52"></a>
<span class="sourceLineNo">053</span>   * @param keyType the key type<a name="line.53"></a>
<span class="sourceLineNo">054</span>   * @param valueType the value type<a name="line.54"></a>
<span class="sourceLineNo">055</span>   */<a name="line.55"></a>
<span class="sourceLineNo">056</span>  public static &lt;K extends Enum&lt;K&gt;, V extends Enum&lt;V&gt;&gt; EnumBiMap&lt;K, V&gt;<a name="line.56"></a>
<span class="sourceLineNo">057</span>      create(Class&lt;K&gt; keyType, Class&lt;V&gt; valueType) {<a name="line.57"></a>
<span class="sourceLineNo">058</span>    return new EnumBiMap&lt;K, V&gt;(keyType, valueType);<a name="line.58"></a>
<span class="sourceLineNo">059</span>  }<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>  /**<a name="line.61"></a>
<span class="sourceLineNo">062</span>   * Returns a new bimap with the same mappings as the specified map. If the<a name="line.62"></a>
<span class="sourceLineNo">063</span>   * specified map is an {@code EnumBiMap}, the new bimap has the same types as<a name="line.63"></a>
<span class="sourceLineNo">064</span>   * the provided map. Otherwise, the specified map must contain at least one<a name="line.64"></a>
<span class="sourceLineNo">065</span>   * mapping, in order to determine the key and value types.<a name="line.65"></a>
<span class="sourceLineNo">066</span>   *<a name="line.66"></a>
<span class="sourceLineNo">067</span>   * @param map the map whose mappings are to be placed in this map<a name="line.67"></a>
<span class="sourceLineNo">068</span>   * @throws IllegalArgumentException if map is not an {@code EnumBiMap}<a name="line.68"></a>
<span class="sourceLineNo">069</span>   *     instance and contains no mappings<a name="line.69"></a>
<span class="sourceLineNo">070</span>   */<a name="line.70"></a>
<span class="sourceLineNo">071</span>  public static &lt;K extends Enum&lt;K&gt;, V extends Enum&lt;V&gt;&gt; EnumBiMap&lt;K, V&gt;<a name="line.71"></a>
<span class="sourceLineNo">072</span>      create(Map&lt;K, V&gt; map) {<a name="line.72"></a>
<span class="sourceLineNo">073</span>    EnumBiMap&lt;K, V&gt; bimap = create(inferKeyType(map), inferValueType(map));<a name="line.73"></a>
<span class="sourceLineNo">074</span>    bimap.putAll(map);<a name="line.74"></a>
<span class="sourceLineNo">075</span>    return bimap;<a name="line.75"></a>
<span class="sourceLineNo">076</span>  }<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span>  private EnumBiMap(Class&lt;K&gt; keyType, Class&lt;V&gt; valueType) {<a name="line.78"></a>
<span class="sourceLineNo">079</span>    super(WellBehavedMap.wrap(new EnumMap&lt;K, V&gt;(keyType)),<a name="line.79"></a>
<span class="sourceLineNo">080</span>        WellBehavedMap.wrap(new EnumMap&lt;V, K&gt;(valueType)));<a name="line.80"></a>
<span class="sourceLineNo">081</span>    this.keyType = keyType;<a name="line.81"></a>
<span class="sourceLineNo">082</span>    this.valueType = valueType;<a name="line.82"></a>
<span class="sourceLineNo">083</span>  }<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>  static &lt;K extends Enum&lt;K&gt;&gt; Class&lt;K&gt; inferKeyType(Map&lt;K, ?&gt; map) {<a name="line.85"></a>
<span class="sourceLineNo">086</span>    if (map instanceof EnumBiMap) {<a name="line.86"></a>
<span class="sourceLineNo">087</span>      return ((EnumBiMap&lt;K, ?&gt;) map).keyType();<a name="line.87"></a>
<span class="sourceLineNo">088</span>    }<a name="line.88"></a>
<span class="sourceLineNo">089</span>    if (map instanceof EnumHashBiMap) {<a name="line.89"></a>
<span class="sourceLineNo">090</span>      return ((EnumHashBiMap&lt;K, ?&gt;) map).keyType();<a name="line.90"></a>
<span class="sourceLineNo">091</span>    }<a name="line.91"></a>
<span class="sourceLineNo">092</span>    checkArgument(!map.isEmpty());<a name="line.92"></a>
<span class="sourceLineNo">093</span>    return map.keySet().iterator().next().getDeclaringClass();<a name="line.93"></a>
<span class="sourceLineNo">094</span>  }<a name="line.94"></a>
<span class="sourceLineNo">095</span><a name="line.95"></a>
<span class="sourceLineNo">096</span>  private static &lt;V extends Enum&lt;V&gt;&gt; Class&lt;V&gt; inferValueType(Map&lt;?, V&gt; map) {<a name="line.96"></a>
<span class="sourceLineNo">097</span>    if (map instanceof EnumBiMap) {<a name="line.97"></a>
<span class="sourceLineNo">098</span>      return ((EnumBiMap&lt;?, V&gt;) map).valueType;<a name="line.98"></a>
<span class="sourceLineNo">099</span>    }<a name="line.99"></a>
<span class="sourceLineNo">100</span>    checkArgument(!map.isEmpty());<a name="line.100"></a>
<span class="sourceLineNo">101</span>    return map.values().iterator().next().getDeclaringClass();<a name="line.101"></a>
<span class="sourceLineNo">102</span>  }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>  /** Returns the associated key type. */<a name="line.104"></a>
<span class="sourceLineNo">105</span>  public Class&lt;K&gt; keyType() {<a name="line.105"></a>
<span class="sourceLineNo">106</span>    return keyType;<a name="line.106"></a>
<span class="sourceLineNo">107</span>  }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>  /** Returns the associated value type. */<a name="line.109"></a>
<span class="sourceLineNo">110</span>  public Class&lt;V&gt; valueType() {<a name="line.110"></a>
<span class="sourceLineNo">111</span>    return valueType;<a name="line.111"></a>
<span class="sourceLineNo">112</span>  }<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span>  @Override<a name="line.114"></a>
<span class="sourceLineNo">115</span>  K checkKey(K key) {<a name="line.115"></a>
<span class="sourceLineNo">116</span>    return checkNotNull(key);<a name="line.116"></a>
<span class="sourceLineNo">117</span>  }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>  @Override<a name="line.119"></a>
<span class="sourceLineNo">120</span>  V checkValue(V value) {<a name="line.120"></a>
<span class="sourceLineNo">121</span>    return checkNotNull(value);<a name="line.121"></a>
<span class="sourceLineNo">122</span>  }<a name="line.122"></a>
<span class="sourceLineNo">123</span><a name="line.123"></a>
<span class="sourceLineNo">124</span>  /**<a name="line.124"></a>
<span class="sourceLineNo">125</span>   * @serialData the key class, value class, number of entries, first key, first<a name="line.125"></a>
<span class="sourceLineNo">126</span>   *     value, second key, second value, and so on.<a name="line.126"></a>
<span class="sourceLineNo">127</span>   */<a name="line.127"></a>
<span class="sourceLineNo">128</span>  @GwtIncompatible("java.io.ObjectOutputStream")<a name="line.128"></a>
<span class="sourceLineNo">129</span>  private void writeObject(ObjectOutputStream stream) throws IOException {<a name="line.129"></a>
<span class="sourceLineNo">130</span>    stream.defaultWriteObject();<a name="line.130"></a>
<span class="sourceLineNo">131</span>    stream.writeObject(keyType);<a name="line.131"></a>
<span class="sourceLineNo">132</span>    stream.writeObject(valueType);<a name="line.132"></a>
<span class="sourceLineNo">133</span>    Serialization.writeMap(this, stream);<a name="line.133"></a>
<span class="sourceLineNo">134</span>  }<a name="line.134"></a>
<span class="sourceLineNo">135</span><a name="line.135"></a>
<span class="sourceLineNo">136</span>  @SuppressWarnings("unchecked") // reading fields populated by writeObject<a name="line.136"></a>
<span class="sourceLineNo">137</span>  @GwtIncompatible("java.io.ObjectInputStream")<a name="line.137"></a>
<span class="sourceLineNo">138</span>  private void readObject(ObjectInputStream stream)<a name="line.138"></a>
<span class="sourceLineNo">139</span>      throws IOException, ClassNotFoundException {<a name="line.139"></a>
<span class="sourceLineNo">140</span>    stream.defaultReadObject();<a name="line.140"></a>
<span class="sourceLineNo">141</span>    keyType = (Class&lt;K&gt;) stream.readObject();<a name="line.141"></a>
<span class="sourceLineNo">142</span>    valueType = (Class&lt;V&gt;) stream.readObject();<a name="line.142"></a>
<span class="sourceLineNo">143</span>    setDelegates(<a name="line.143"></a>
<span class="sourceLineNo">144</span>        WellBehavedMap.wrap(new EnumMap&lt;K, V&gt;(keyType)),<a name="line.144"></a>
<span class="sourceLineNo">145</span>        WellBehavedMap.wrap(new EnumMap&lt;V, K&gt;(valueType)));<a name="line.145"></a>
<span class="sourceLineNo">146</span>    Serialization.populateMap(this, stream);<a name="line.146"></a>
<span class="sourceLineNo">147</span>  }<a name="line.147"></a>
<span class="sourceLineNo">148</span><a name="line.148"></a>
<span class="sourceLineNo">149</span>  @GwtIncompatible("not needed in emulated source.")<a name="line.149"></a>
<span class="sourceLineNo">150</span>  private static final long serialVersionUID = 0;<a name="line.150"></a>
<span class="sourceLineNo">151</span>}<a name="line.151"></a>




























































</pre>
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